Volume 40, Issue 5 (September 2012)

    Chloride Binding Capacity of Cement Paste Containing Layered Double Hydroxide (LDH)

    (Received 12 March 2012; accepted 10 April 2012)

    Published Online: 2012

    CODEN: JTEOAD

      Format Pages Price  
    PDF 5 $25   ADD TO CART


    Abstract

    The chloride binding capacity of concrete can affect the rate of chloride ingress, which ultimately determines the chloride-ion resistance. A layered double hydroxide (LDH) can absorb the chloride ions in cement paste and delay chloride ingress in the structure. A method for evaluating the chloride binding capacity of cement paste was used in the experiment reported herein. We compare Mg-Al LDH under different treatments (including CO32− series and NO3 series) in order to determine the chloride binding capacity of the LDH. The binding mechanism is explored in this article. The experimental results indicate that LDH processes have a remarkable chloride ion binding capacity. The addition of LDH can improve the chloride binding capacity of cement paste significantly. Cement paste containing roasted LDH has a better chloride binding capacity than that containing unroasted LDH or rehydrated LDH. Based on the comparison of LDHs with different anions, the chloride binding capacity of NO3 series LDH appears to be more powerful than that of CO32− series LDH.


    Author Information:

    Zhonghe, Shui
    School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan,

    State Key Lab of Silicate Materials for Architectures, Wuhan,

    Juntao, Ma
    School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan,

    State Key Lab of Silicate Materials for Architectures, Wuhan,

    Wei, Chen
    School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan,

    State Key Lab of Silicate Materials for Architectures, Wuhan,

    Xiaoxing, Chen
    School of Materials Science and Engineering, Wuhan Univ. of Technology, Wuhan,

    State Key Lab of Silicate Materials for Architectures, Wuhan,


    Stock #: JTE20120054

    ISSN: 0090-3973

    DOI: 10.1520/JTE20120054

    ASTM International is a member of CrossRef.

    Author
    Title Chloride Binding Capacity of Cement Paste Containing Layered Double Hydroxide (LDH)
    Symposium , 0000-00-00
    Committee C01